Hmmm.........  I was intending to keep them moist so I hope it will work.  The reason for going this route was that when I had my first garden in UK, there were a couple of old coal bunkers and I just dumped all my prunings and lawn mowings in there (no kitchen waste as it was just a dumping ground).  When they were full (3 or 4 months) I was very surprised to find that the bottom half of the bins was superb compost (I'm talking Monty Don stuff).  I'll be a bit miffed if it doesn't work after the effort involved.  By the way, how do you add pics to posts?  Do they have to be hosted elsewhere?  Tried uploading but no joy.